Off-Road Large Spark-Ignition (Gasoline and LPG) Equipment Regulation (LSI Regulation)

This page last reviewed September 25, 2015



To achieve its healthy air quality, climate, and sustainability goals, California must take effective, well-coordinated actions to transition to a zero emission transportation system for both passengers and freight.  The freight transport system is a major economic engine for California, but also accounts for about half of toxic diesel particulate matter, 45 percent of the emissions of nitrogen oxides (NOx) that form ozone and fine particulate matter in the atmosphere, and 6 percent of the greenhouse gas emissions in California.  These statistics include emissions from trucks, ships, locomotives, aircraft, harbor craft, and all types of equipment used to move freight at seaports, airports, rail yards, warehouses and distribution centers.  Proposed amendments to the LSI Fleet Regulation are identified in the Sustainable Freight Strategy as a Near-Term ARB Measure. 

In 1998, ARB first adopted emission standards for new spark-ignited engines used in propane forklifts and other similar industrial equipment.  These engines are referred to as large spark-ignition engines.  In addition to forklifts, the LSI category includes airport ground support equipment (GSE), sweepers and scrubbers, generator sets, small irrigation pumps, and a variety of other similar equipment.  

The LSI Fleet Regulation applies to operators of forklifts, sweeper/scrubbers, industrial tow tractors, and airport GSE.  These vehicles are found in approximately 2,000 LSI fleets in California in industries as diverse as manufacturing, wholesale, transportation and utilities, retail, services, and construction, as well as public agencies.  The 2006 LSI rulemaking and 2010 amendments required operators of in-use fleets to achieve specific hydrocarbon + NOx fleet average emission level (FAEL) standards that became more stringent over time, the lowest FAEL for large and medium fleets was to be achieved in 2013.  The standards are also more stringent for forklifts than they are for non-forklift fleets.  The stringency of the standards reflects the differences in availability of retrofit devices for the four categories of in-use LSI equipment as well as the greater ability of large fleets to incorporate zero- and near zero-emission equipment into their operations.  Since 2007, fleet operators are required to keep updated fleet records at their facilities until June 30, 2016.  Small fleets and in-field agricultural equipment are exempt from the LSI Fleet Regulation. 

What's New

Posted September 25, 2015
  • Public Workshops To Discuss Proposed Amendments To The Off-Road Large Spark-Ignition Engine Fleet Regulation

Staff is developing a proposal to require reporting and labeling, similar to the existing In-Use Off-Road Diesel-Fueled Fleets Regulation, for equipment covered by the LSI Fleet Regulation.  Additional minor clarifications are also being proposed.  The proposed amendments are critical to providing needed inventory updates, facilitating uniform compliance, and identifying incentive opportunities.  Staff is also interested in hearing from affected stakeholders on alternatives to achieving these same objectives.  For more information, please contact Todd Sterling, Air Pollution Specialist, at (916) 323-2397.  To be apprised of public workshops or other opportunities for public input, please subscribe to the regulation mailing list. 

September 29, 2015
10:00 am-12:00 pm
Cal EPA Building
Byron Sher Auditorium

1001 I Street

Sacramento, CA 95812

For those unable to attend in person, webcast may be accessed

September 30, 2015
10:00 am-12:00 pm  

South Coast Air Quality Management District
21865 Copley Drive
Diamond Bar, CA 91765


For those unable to attend in person, webcast may be accessed here.

October 08, 2015
10:00 am-12:00 pm
San Joaquin Valley Air Pollution Control District
1990 E. Gettysburg Ave.
Fresno, CA 93726


For those unable to attend in person, webcast may be accessed here.

Public Meetings